September 2022 - North Coast Post-Storm Recovery Survey - Digital Terrain Model

<div style='text-align:Left; font-size:12pt;'><p>Fugro were commissioned to undertake a post storm LiDAR survey of the soft sedimentary areas along the north coast of Northern Ireland in March 2022. This survey was to cover the following areas: Curran Strand, Portrush East Strand, Portstewart Strand and Downhill Beach to Magilligan.</p><div style='text-align:Left; font-size:12pt;'><p>This project was commissioned following the successive storm events during February and March 2022 (Storm Dudley, Storm Eunice and Storm Franklin) which did considerable damage to the sandy beaches along the North Coast. The objective of this survey was to ascertain change which has occurred along these soft sediment coastlines at the north coast since the baseline survey, which was acquired in 2021.</p><div style='text-align:Left; font-size:12pt;'><p>Data was provided in the same format as the topographic LiDAR data collected in the Northern Ireland 3-Dimensional Coastal Survey to allow changes between these two datasets to be ascertained.</p><div style='text-align:Left; font-size:12pt;'><p>Later in the year Fugro were commissioned to undertake a second LiDAR survey of the north coast from White Rocks to Magilligan in September 2022. The aim of this repeat survey was to ascertain the levels of recovery along the soft sediment coastlines since March 2022.</p><div style='text-align:Left; font-size:12pt;'><p>As with the initial survey undertaken by Fugro this topographic LiDAR survey collected data from the intertidal area to 10m inland for the same soft sediment areas along the north coast, with data being acquired at 0.5m resolution. The survey was quite restrictive when it could be flown: it had to be 2 hours either side of Low Water, during clear conditions below 6000ft, sun had to be at a suitable angle to capture imagery and as photography was being captured the survey could only be flown during day light hours. </p><div style='text-align:Left; font-size:12pt;'><p>All data collected was to be directly comparable with the data collected in the initial post storm Survey undertaken, as this would help us to understand and accurately quantify how our soft, sedimentary coastlines respond and recover from extreme storm events.</p><div style='text-align:Left; font-size:12pt;'><p>This is the Digital Terrain Model that was collected as part of the post-storm recovery survey.<br /></p></div></div></div></div></div></div></div>富格罗（Fugro）受委托于2022年3月开展北爱尔兰北海岸沿线软沉积区域的风暴后激光雷达（LiDAR）测绘工作，本次测绘覆盖以下区域：卡伦滩（Curran Strand）、波特拉什东滩（Portrush East Strand）、波特斯特沃特滩（Portstewart Strand）以及当希尔海滩（Downhill Beach）至马吉利根（Magilligan）的沿岸区域。 本项目的委托背景为2022年2-3月接连发生的三场风暴（达德利风暴、尤妮斯风暴、富兰克林风暴），此类极端天气对北海岸沿线的沙质海滩造成了严重破坏。本次测绘的目标是明确自2021年基准测绘完成以来，北海岸沿线这些软沉积海岸发生的变化。 本次采集的数据与北爱尔兰三维海岸测绘所获取的地形激光雷达数据格式一致，以便于比对分析这两份数据集之间的变化情况。 同年晚些时候，富格罗（Fugro）受委托于2022年9月开展北海岸从怀特罗克斯（White Rocks）至马吉利根（Magilligan）的第二次激光雷达测绘。本次复测测绘的目标是查明自2022年3月以来，软沉积海岸沿线的恢复程度。 与富格罗（Fugro）开展的首次测绘一致，本次地形激光雷达测绘针对北海岸沿线的同类软沉积区域，采集了从潮间带至内陆10米范围内的数据，数据采集分辨率为0.5米。本次机载测绘的作业条件存在诸多限制：需在低潮前后2小时内开展，且飞行高度需低于6000英尺且天气晴朗；太阳需处于合适角度以保障影像采集，且仅可在日间时段开展飞行测绘作业。 所有采集的数据需与首次风暴后测绘所获取的数据具备直接可比性，以便于研究并精准量化软沉积海岸对极端风暴事件的响应与恢复过程。 本数据集即为本次风暴后恢复测绘所采集的数字地形模型（Digital Terrain Model）。